BL27 Xiaochangshu (Small Intestine Shu Point)

小腸俞xiǎo cháng shūXiaochangshu

Bladder Meridian

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Location of acupuncture point BL27 Xiaochangshu (Small Intestine Shu Point)
30
Indications
20
Protocols
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Location

1.5 thumb widths lateral to the du mai at the level of the 1st posterior sacral foramen.

Categories

  • Back-Shu point of the Small Intestine

The classical groups this point belongs to, from Deadman, Al-Khafaji & Baker, A Manual of Acupuncture.

Cautions

Avoid deep perpendicular needling.

Indications

Conditions for which BL27 is listed as indicated. An indication list is a reference index, not a prescription – see the protocols below for sourced treatments.

Agitation HeartConstipationDamp CloudyDiabetes InsipidusDiarrheaShan DisorderDryness Mouth AcuteDysenteryBreathing Shortness Of Breath ProblemsDefecation ProblemsUrinary ProblemsBedwettingHemorrhoidsVaginal DischargeMyalgia Back Long ExtensorsLower Abdominal PainLower Back PainHaemorrhoids PainParaumbilical PainTesticle PainUrinary RetentionSeparate Pure From CloudyBlood in StoolStools MucusFeet SwellingDamp Heat SyndromeDamp-heat SyndromeUrine BloodUrine DarkUrine Yellow

TCM actions

What classical sources say BL27 does in the terms of Chinese medicine theory. These describe the point, not a condition.

Benefit Regulate BladderBenefit Regulate IntestinesBenefit Regulate Qi Small IntestineRegulate BladderRegulate IntestinesRegulate Qi Small Intestine

Protocols using BL27

  • Cervical Pain, Labour Pain, Uterine Pain – LI04, ST29, SP12, BL27, KD11, LV03 (doi:10.1136/acupmed-2016-011164 ↗)
  • Abdominal Pain, Postoperative Pain, Post-Operative Nausea, Post-Operative Vomiting, Abdominal Bloating – LI04, ST36, ST37, BL21, BL27, PC06 (doi:10.2147/CMAR.S292325 ↗)
  • Radiculopathy, Lower-limb Numbness, Lower-back Pain, Radiating Lower-limb Pain, Disc-herniation Lumbar Extruded – BL23, BL24, BL25, BL26, BL27, BL28, BL29, BL30, GB30 (doi:10.3389/fneur.2024.1381292 ↗)
  • Knee Pain, Osteoarthritis Knee, Stiffness Knee – ST34, BL19, BL21, BL23, BL25, BL27, BL40 (doi:10.1186/s12906-025-04891-1 ↗)
  • Groin Pain, Lower Back Pain, Sacroiliac Pain, Pubic Symphysis Pain, Difficulty Walking, Postpartum Symphysis Pubis Diastasis, Qi Stagnation Blood Stasis – BL23, BL24, BL25, BL26, BL27, BL28, BL29, BL30, BL53, BL54, GB27, GB28 (doi:10.21037/acr-2025-189 ↗)
  • Premature Ejaculation, Sexual Dysfunction – ST36, SP12, SP13, BL23, BL27, BL28, BL29, BL30, BL31, BL32, BL33, BL34, BL47, KD01, KD03, CV04, CV06 (doi:10.4103/0973-6131.113408 ↗)
  • Leg Pain, Leg Numbness, Leg Weakness, Radiculopathy Lumbar, Lower-back Pain – BL22, BL23, BL24, BL25, BL26, BL27, BL31, BL32, BL33, BL34, BL54, GB30, GV03, GV04 (doi:10.3831/KPI.2025.28.4.269 ↗)
  • Lumbar Pain, Stenosis Lumbar Spinal, Claudication Neurogenic, Lower Extremity Pain – SP06, BL23, BL24, BL25, BL26, BL27, BL36, BL40, BL57, BL60, GB30, GB31, GB34, GV03, GV04 (doi:10.13517/j.cnki.ccm.2025.05.015 ↗)
  • Obesity Simple – BL25, BL26, BL27, BL28, BL30, KD03, KD11, KD12, KD13, KD14, KD15, TB06 (doi:10.1016/s0254-6272(08)60033-3 ↗)
  • Obesity Simple – LI04, LI11, LI14, ST24, ST25, ST27, ST32, ST34, ST36, ST40, SP04, SP06, SP10, SP15, BL13, BL15, BL17, BL18, BL19, BL20, BL21, BL23, BL25, BL27, PC06, LV03, CV04, CV06, CV10, CV12 (doi:10.1016/s0254-6272(08)60033-3 ↗)
  • Ileus Postoperative, Abdominal Postoperative Pain, Recovery Postoperative – LI04, ST36, ST37, BL21, BL27, PC06 (doi:10.2147/CMAR.S292325 ↗)
  • Sciatica, Low Back Pain, Disc Herniation Lumbar – BL23, BL24, BL25, BL26, BL27, BL28, BL29, BL30, GB30 (doi:10.3389/fneur.2024.1381292 ↗)
  • Low Back Pain, Pelvic Girdle Pain – BL23, BL24, BL25, BL26, BL27, BL28, BL31, BL32, BL54 (doi:10.1186/s40814-016-0107-6 ↗)
  • Pubic Symphysis Pain, Postpartum Symphysis Pubis Diastasis – BL23, BL24, BL25, BL26, BL27, BL28, BL29, BL30, BL53, BL54, GB27, GB28 (doi:10.21037/acr-2025-189 ↗)
  • Leg Pain, Back Low Pain, Stenosis Lumbar Spinal, Claudication Neurogenic – BL27, BL52, GB30, GV06 (doi:10.2147/JPR.S625942 ↗)
  • Infection Urinary Recurrent – ST36, SP06, BL24, BL25, BL26, BL27, BL28, BL60, KD06, KD07, KD13, KD14, KD15, GV20, CYC11, CYC13, IAC03 (doi:10.1007/s00192-024-05872-7 ↗)
  • Sciatica, Lumbar Disc Herniation – BL23, BL24, BL25, BL26, BL27, BL30, BL40, GB30 (doi:10.3389/fpain.2026.1853632 ↗)
  • Labor Pain – LI04, ST29, SP12, BL27, KD11, LV03, XH03 (doi:10.1136/acupmed-2016-011164 ↗)
  • Heat Bladder, Damp Bladder, Heat Bladder, Damp Bladder – ST28, SP11, SP12, HT08, BL22, BL27, BL28, BL31, BL35, BL36, BL39, KD10 (Yang Yong-Xuan, clinical point-selection notes)
  • Damp Large Intestine, Heat Large Intestine, Damp Large Intestine, Heat Large Intestine – LI01, LI03, LI09, LI11, ST22, ST25, SP04, SP15, SP16, BL25, BL27, BL28, BL37, BL39 (Yang Yong-Xuan, clinical point-selection notes)

Most often selected alongside BL27

How many sourced protocols in the index pair each point with BL27. Corpus frequency, not a combination to use.

  • BL25Large Intestine Shu Point13 protocols
  • BL23Kidney Shu Point11 protocols
  • BL26Original Qi Gate Shu Point10 protocols
  • BL28Bladder Shu Point10 protocols
  • BL24Sea Of Qi Shu Point9 protocols
  • BL30White Ring Shu Point7 protocols
  • GB30Jumping Circle6 protocols
  • BL29Middle Spine Shu5 protocols
  • LI04Junction Valley5 protocols
  • ST36Leg Three Miles5 protocols
  • BL21Stomach Shu Point4 protocols
  • BL31Upper Bone Hole4 protocols

Other points on the Bladder Meridian

BL01BL02BL03BL04BL05BL06BL07BL08BL09BL10BL11BL12BL13BL14BL15BL16BL17BL18BL19BL20BL21BL22BL23BL24BL25BL26BL28BL29BL30BL31BL32BL33BL34BL35BL36BL37BL38BL39BL40BL41BL42BL43BL44BL45BL46BL47BL48BL49BL50BL51BL52BL53BL54BL55BL56BL57BL58BL59BL60BL61BL62BL63BL64BL65BL66BL67